I did wonder if you could use a math_function node to combine to other nodes. I know face_off suggests doing it with ambient occlusion if you have inputs into either alt diffuse or alt specular (since they have no 'value' setting to plug into, use a math_function set to multiply - value 1 at 1, connected to whatever you had in the channel originally, value 2 also at 1, connected to the ambient occlusion node). Whether this would work elsewhere I don't know - and of course, if you're using colour, you might want to use colour_math instead of a plain math_function, which desaturates all its output. jonthecelt